Metal deforming – With use of control means energized in response to activator... – Sensing tool or tool-linked part
Patent
1995-06-07
1997-11-18
Larson, Lowell A.
Metal deforming
With use of control means energized in response to activator...
Sensing tool or tool-linked part
72351, B21D 2408
Patent
active
056875983
ABSTRACT:
A press wherein a blank-holding force generated by cushioning cylinders is transmitted to a pressure member through cushion pins for holding a blank during a pressing operation by a die and a punch, and is controllable by a pressure adjusting device according to an optimum pattern of control by controlling a difference between fluid pressures in two pressure chambers of each cushioning cylinder whose volumes decrease and increase, respectively, as the cushion pins are lowered.
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Hirao Norihisa
Kirii Kazunari
Larson Lowell A.
Toyota Jidosha & Kabushiki Kaisha
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